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Photos and descriptions of Third Grade science outreach program on Human Anatomy at Farmersville Elementary School.
 
Human Anatomy
Farmersville Elementary School, Spring 2009
Grade 3

In order to help us with our science unit on Human Anatomy, Dr. DeLeo provided us with a full sized model of the human skeleton. We also got to use a model of the human torso, with organs that came out, and a model of the human heart and brain. We could take the brain apart and put it back together.

We named the skeleton "Señor Bones." Señor Bones helped the technician from Lehigh University mount the giant Timeline painting on the wall. He is a very good skeleton!

 
 Dr. DeLeo spoke to us about DNA and the genetic code. The genetic code uses four different chemicals. One ordering makes someone who has blue eyes, another brown eyes. One order makes a human being, another makes an artichoke.

DNA is called a "double helix," a "helix" because it twists like a spiral staircase, and "double" because it is a pair of helixes. The four chemicals have names, but they can be abbreviated by the first letters, A, T, C, and G. The two strands making up the double helix are side-by-side. If there is an "A" on the left, then there will always be a "T" on the right. So, "A" goes with "T" (A-T). Similarly, "C" goes with "G" (C-G). This pairing makes it possible for our cells to divide and make exact duplicates. When a cell is about to divide, the strands come apart, and each one picks up just the right partners to make two new, identical double helixes, one in each of the two cells.

Dr. DeLeo helped us to understand this by giving us beads in fours colors, representing A, T, C, and G. We used a pipe cleaner to put together our make believe DNA. Here are some pictures of them.

In addition to the DNA models, we each got a cool placemat on human anatomy. We love science!

 
 
 I hope you have enjoyed this web presentation as much as we enjoyed sharing the actual learning experience with your son or daughter. Although we have endeavored to exclude photographs where permission has been denied, it is possible for errors to occur. If you would like us to remove a photograph of your son or daughter for any reason, please send me an e-mail message at lgd0@lehigh.edu or call me at 610-758-3413, and we will remove it promptly. Please note that we will never associate a child's full or last name with a photograph except in circumstances where special permission was explicitly provided. Thank you. Gary DeLeo.

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Science Learning Adventures
Lehigh University Department of Physics
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lgd0@lehigh.edu

Copyright © 2009 Gary G. DeLeo and Kristen D. Wecht, Lehigh University